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There were many serious business applications available for the CPC6128 running under [[CP/M]]-80. To name a few, [[WordStar]] and [[Protext]] for word processing, [[Multiplan]] and [[SuperCalc 2]] for editing spreadsheets, [[DBase II]] for making databases... Noticewere such applications, that to name a few. Furthermore there were also more than 13 high level languages ([[Programming software]]) available for the CPC6128 running under CP/M-80 that were used for research and development. '''COSMOS''' is a personal '''COS'''t '''MO'''nitoring '''S'''ystem written developed by [[KSL|KSL]] which runs under CP/M-80. It is a personal business application similar to the MSDOS-era PC applications and one of the most recent (2020) projects developed for CP/M-80. Unlike most business applications for CP/M, COSMOS is built upon the mouse based graphics user interface as pioneered by Xerox at Palo Alto and popularized by Apple with the Lisa and Macintosh computers. <br>  COSMOS The application can be used on an everyday basis in order to edit the daily income, plan the monthly expenses and perform trial and error analyses aiming at maximizing the annual profit. COSMOS requires the [[Dobbertin]] 63 KB TPA version of [[CP/M|CP/M 2.2]], and an external disk drive (min 360 KB) and . Moreover, it supports the 512 KB [[Dobbertin Memory Expansion]], the 20 MB [[Dobbertin Harddisc]], the [[Amstrad Serial Interface]], the Amstrad Parallel [[Printer Port]], the [[CTM640/CTM644]] color monitor for the 16-color screen saver and the [[AMX Mouse]]. Furthermore, COSMOS also contains the latest version of [[ASCII Tools]] in order to deal with the COSMOS large output text files. <br> By executing the setup installation utility (A>SETUP) of the application, the user can initialize any annual project or start a temporary project in order to become familiar with the COSMOS user interface and functions. <br> As far as the controls are concerned, '''Cursor keys''' or '''Mouse''' can be used in order to control the pointer. '''[F0]''' key simulates the left button of the mouse, whereas '''[F.]''' key simulates the right button of the mouse. Left button can be used for (Yes), whereas the right button can be used for (No),(Next) or (On-Board) help. ESC key can be used to quit. <br><br> 

'''Boot CP/M using the original COSMOS disk and execute A>SETUP.COM.''' <br> <br>Upon installing COSMOS in drive B or HD20 it is suggested to execute COSMOS using all the available extra RAM (no RAM load minimization) and to use a new empty boot disk in drive A as the redundant disk (user level software RAID-1 operation). A Notice that a full annual project of COSMOS, including the user attachments, the user block of invoices, the summary files as well as the user agenda notices requires minimum 350 KB of disc space. <br><br>